+<%doc>
+
+Allows emailing one or more customers, based on a search for customers. Search can
+be specified either through cust_main fields as cgi params, or through a base64 encoded
+frozen hash in the 'search' cgi param. Form allows selecting an existing msg_template,
+or creating a custom message, and shows a preview of the message before sending.
+If linked to as a popup, include the cgi parameter 'popup' for proper header handling.
+
+This may also be used as an element in other pages, enabling you to pass along
+additional substitution parameters to a message template, with the following options:
+
+form_action - the URL to submit the form to
+
+sub_param_process - subroutine to override cgi param values (such as msgnum)
+and parse/delete additional form fields from the cgi; should return a %sub_param
+hash to be passed along for message substitution
+
+alternate_form - an alternate form for template selection/message creation
+
+title - the title of the page
+
+</%doc>
+